#include<iostream>
using namespace std;
const int N=1e5+10;
int a[110][110],n,x,y,cnt=1;
int main(){
    cin>>n;
    a[1][1]=1;
    x=2;
    y=1;
    while(cnt<n*n){
        while(x>=1&&y<=n){
            a[x][y]=++cnt;
            x--;
            y++;
        }
        if(x==0&&y<=n){
            x++;
        }else{
            x+=2;
            y--;
        }
        while(y>=1&&x<=n)
        {
            a[x][y]=++cnt;
            x++;
            y--;
        }
        if(y==0&&x<=n){
            y++;
        }else{
            x--;
            y+=2;
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++)
        cout<<a[i][j]<<" ";
        cout<<endl;
    }
    return 0;
}